Lug strap



Jaa-11.11940.l B,T AK 2,185,585

LUG STRAP Filed Jan. 14, 1938 2 Sheets-Sheet 1 Jan.l2,194o. a 1 CLARK 2,185,585

LUG- STRAP Filed Jan. 14, 1938 2 Sheets-Sheet 2 Patented Jan.` `2,

2,185,585 f LUG STRAP n y Bre'cknridgeil. Clark,fDanielson, Conn., assigner to H.; JacobafManufacturing Company, Inc., Danielscm- Conn., a' corporation 5 of Connecti-gy .Application January 14,1938; serialNm1,841,9984

' fuiclaimg. (01.. 139-153),

`My present inventionis y'a novel and improved ylug-i strap. for usefin" looms, andi' isf directed moreparticularly tof?y theity'pel of lug,l strap haviri'gI-a plug seoured'in theheel: portion to with- 'standwean'i 'and' thru which theA shocks between th'elug str-apiand the Lpickeri stick 'of vtheloorn are .transmitted v, l -v j Heretofore in themanufacture of luygfstraps having` plugs, sucht plugs have-usually been made of Wood, rubber; interrolled canvas,- nbre, leather,

or other relativelylhard or hardened material andsecured tothe-arms of the lugistrapfbya rivet, bolt,lorzbolts, whichfbolt'isof f iron, steel, or'rnetal and passes thru .bo'thof fthe armsas'wellas the plug,- ,having oneV end riveted over a washer, thus holding: they plugi tightly 'between the head and rivet. Y y I This; construction has v ployedawheth'erj'or not the armsofthe lues strap werel'oflcanvas; wood,'.orlmetal,' andwhether or contouror with simply two arms boltedi'thru' the.

plugat thewheel ,of thestrap.v While my!-presentinventionis more' particularly: directed to. the typ'eoflug strapbeing' formed of inter-'rolled canva'sisecured by adhesive andisubjectedto;pressureandKieran-ing', yet it is f Within the-scope' ofthe present invention to make the: vugeshaped' portion of .the lug 'strap `of any material otherth'an canva's1 int which the features of my; present' invention are incorporated;

Great' diiliaultyhas Yheretoiorebeen-experienced inz the use ofi ai riveted lug`r strap -since fthe-'metal rivet. picksA Y up and' transmits the shocks, blows,

stress;andipressuresfincident'to the contact of theipircikerI stick and theplug, aridin the case of la plugl-ofwoodprubber, leather, orcanvas, and withthe' arms ofthe( lug'strap of canvas, the

. metal of the rivet was constantly wearing and damaginglsame; `Also,l when a-rivetiskusedit is necessarily putthru a'bored -recess `appro'xirnateli7 in thein'iidd-le ofthe'plug and, hence, when'the plug' is'. Worn thru Y until ,the` rivet is' exposed, the lug strapvthenbecome's useless sinoethe striking of? the'rivet' against-the VWooden *pickerl stick damages theA stick. Hence,'rin`=prior riveted lug strap'iconstruction-the 'lugstrap vwas' useless when the vplugiwa's 'worn half'r thru;` unless 'removed and repaired;

'Because of' theI constant hammeringfan'd Ithe severity of the servieeltc-which the lugA strap is subje'ct'edg. itzis' impractical to rely upong-luejor adhesivehalone tolniantainfa-plugiin .the heel of ya lugfrstrap, The constantzhammeriing loosens the f cohesion'.ofanyfkrrowrrbinderf,andi the drying and -been universally veinlmeansl of holding i a plug inadequate.

the hardening of the adhesive usually renders this Therefore l it `has beenheretofore the universal practice to rely-v on' a metal rivet, or bolt, passing thru the center ofthe plug as above explained.

litt-present invention obviatesthe prior dini-y culties experienced with lug straps having aV plug Vthereingahd.Thave Adevised' a novel piocessand produced anew rarticle of 'f manufacture consisting-'oi avlri'vetless plugflug strap, wherein substanlo l,

tially the entire thickness rlof the 'plug can be sub# jectedtolwear without injury or damage to the f picker stick', thereby greatly prolonging the life andusefulness of thelug strap:k

Furthermore; my present invention provides a rivetless lue,r strap construction wherein the,L

constant,hammeringA action between the picker stick4 and the plug servesto lhold andforce `the plug more closely intofcontact with `the heel lof i",

the lug-strap inwhich itis tted. These desire able features I am enabled` to secure by' a simple and eiiicient'process'oimanufacture, in ani ecoburdensome *manufacturing steps-- and methods. In carrying outiny inventionl provide a con-` structionrof lug' strap'and plug wherein each is ynomical manner, and withoutvundue expense, or

socon'structed and arranged as to cooperatively,r

interloclewith theother, thus maintaining the plugin' the' heelpf" the 'lug strap, which inter-` locking! construction tends-to be increased and tightened bythe constant hammering (if-fthe;`

picker stick;

' Icarry outiny presentinvent'ion by providingr v arecess in the heel of the lug strap and constructing and arranging the plugitseli rto iitfwitlijinsaid recessiarid interlock therewith, both lug,

strapV and plugl being formed with cooperatively interlocking portions therefor. Whilelmay form the heel'of the lug strap either cfcanvas-or metal by-rnoldinga recess therein lto fit 'correspondinglyr apart or all'oi the'plug structure, I mayl also mold oriorminterlocking ribs, flanges, mortices,

,or ribs, flange, or flanges, mortice or d'ovetailed devices can be formed in the heel and cooperating `recesses in the plug, or, 'vi'cej'versay l Iurthern'iore, such` interlocking means arep're'-` erablyformed-.or molded integral'with the heel ofthe lug strap v"and the. plug', but the `saine "or equivalent self-locking-vcooperating members i both inthe plug or heel. Thus a projecting rib;

be separate units,` such as vwcodor fibre.' y

If metal rnorticing orfinterlockingmembers are desiredto'beused they should" be at `the extrem'eh'eelportionv or in the sides out oirangey of the jlin'e ofcontact with the picker stick vso as embodiments,

not toA damage the picker stick when the plugv is worn substantially thru. This is important as rone of the prime features of my present invention in providing a rivetless plug lug strap is to eliminate the danger of the plug wearing thru to the metal fastening device, which would damage the picker stick. i Further advantages, novel features, and combinations will be hereinafter more fully pointed out and claimed.

Referring to the drawings illustrating preferred Fig, 1 is a plan View withplug and interlocking construction;

Fig. 2 is a side View; Fig. 3 is a cross-sectional view on the line 3-3 of Fig. 1; 1

Fig. 4 is a cross-sectional view on the line 4-4 of Fig. 2';

Fig. 5` is a cross-sectional view on the line 5-'5 j L of Fig. 2;

Fig. 6 is a perspective view showing the lug strap broken away;

Fig. 7 is a view in perspective of a modified form of plug;

Fig. 8 is a cross-sectional View illustrating the lfitting of the plug of Fig; 7;

Fig. 9`is a fragmentary cross-sectional View of a modified form on the line 9-9. of Fig; 10;

Fig. 10 is a fragmentary cross-sectional View on the line ID-Hi of Fig. 9;

- Fig. 11 is a cross-sectional view on the line H--Il of Fig. 9; y Fig. 12 is a side View of a further modification; Fig. 13 being a cross-sectional view on the line l'l--I'I of Fig. 16, and

Figs. 18 and 19 are plan and side views, ree spectively, of a still further modification.

As shown in the drawings, Figs. 1 and 2 are plan and side views, respectively, of a lug strap made in accordance with any standard or desired method or construction, but preferablyin accordance with the reinforced lug strap con-1 struction of U. S. patent to W. I. Bullard No.

1,775,077, wherein the lug strap is formed of in terrolled canvas, coated with adhesive, and reinf forcing layers, and then subjected to pressure and formed into U-shaped contour. having a rounded heel portion I and side arms ZHZ, each Vand 8--8 as shown at the bottom sidev arm provided with slots 33 to receive a securing bolt. At the heel portion I form the 4lug strap, when subjected to the molding pressure, with a recessed indentation 5,` being indented substantially around the heel part iv and extending along each arm 2 2 a distance equal tothe thickness of the plug which is to be tted therein. f

As shown in the drawings, this recess 5 would extend from approximately the position 5 5, see Fig. 5, around the heel part longitudinally of the lug strap, and vertically or rwidthwise .of the strap substantially as shown in Figs. 3 andfl,v leaving a small extending flange "l-fl at the top portionv in .which the plug l is tted. The plug lli in order to cooperate in size and area withthe recessed portion andto fit between the top flange 'l and bottom` flange 8 of my improved lug strapk around the recess .5 is made of appropriate dimensions and` short in length so as to be automatically fitted or sprung into the recess 5; and

and encircling `flanges 'and the ridge of the indentation 5 at the forward portion in each arm.

' Preferablythe contacting facesnr walls of the plug IB and the recess 5 is iittedgwithf-'adhesive to hold the same, but the interlocking or morticed construction dovetailing the plug and heel thereupon it is held therein by the overlapping` portion of the .lug strap together constitutes the main retaining features, holding the plug with-` ,Preferably, and as herein'shown, I may in the space at the top and bottom between the overhanging flanges Tand 8 and the endportions of the plug I0 with any filling material l2,

such as an additional adhesive, which will harden into form, orl plastic Wood or any other suitable material.

In Figs; 7and 8 I have illustrated a .modified construction of plug wherein the lplug l5 is so formed and constructed to eliminate the lling material l2 just explained. In this form the plug i5 is of sufficient length to equal the width of vthe lug strap and is provided with a shouldered portionvl and I7 at each end to fit in the'over.- lapping flanges 'l and 8, respectively, and to extend smoothly flush with the top and bottomportions of the :heel ltand arms 2, thus still fur-r ther interlocking the plug and lug strap together.`

In this form, also, a coating of adhesive; will be supplied to the contacting faces of the'plug and k' lug strap. n In Figs. 9,10, and 11 a still further modification is shown, wherein the lugstrap has the' heel portion 2U and arms 2l formed without adepression 5, or its equivalent; butv on the con# trary has the interlocking feature mainly on i the plug itself.

In this form the plug-122 e`X-.

tends throughout the entire width ofthe heel portion and has fitted at top and bottom an over-` lappingflange 23,-23 secured by wooden or nonmetallic pegs 24v-24 which extend only partly into u the plugv 22 and which'will not injure the picker stick if it vdoes come in contact with them during the wearing down of the plug. If desired, the overlapping flanges 23 may be otherwise secured and may also be mortised or recessed in the top of the arms 2| and heel portion 20 to provide' a ush surface, if desired.

In Figs. 12, 13, and 14 I have illustrated a still further modification, `wherein the lug strap 25'and arms 26--26 are recessed, as shown at 27, similar to the formof Figs. 1 Ato 5, and with a plug 28 tted therein; but in addition -to the interlocking and overlapping flange portions conf stituting. the boundary of ythe recess 2",` I mold a projecting internal rib or`ridge 30 in vthe lugv strap to dove-tail with a correspondingly formed recess 3i in the plug 28 to provide afurther interlocking feature.

cation is illustrated, .wherein the lug strap has the heel portion andI arms 36 moldedwith the recess 5 and an" encircling rib 31 interlocking with a corresponding groove 38formed in' the plug il!! extending around the recess 5 formed therein, which groove may be and preferably is of the same extent as the flanges l and "3, at v v Inthis form,v also, iilling material l2--I2 is supplied to cover top andhottomoi the recessy5.

the ends of the plug .40, which is shorter than the width of the lug strap; k

In Figs. 18 and 19 there is shown a still further modification of my plugrlug strap construction eliminating rivets or kmetal fasteners. In this latter forin I utilize a typical lug strap with a heel portion d@ .and arms 45and fit therein a plug 56 which is attachedto a U'-shaped leather,r

or the like, member 4T! of substantial length and with non-rnetallic pins 49, 49, together with glue holding the plug 5i) and U-shaped strap 41 toeether.

Thereupon the outer face ofthe U-'shaped strap il and inner contacting surface of the lug strap f around the heel and arms are coated withadhesive and the same united, the long glued or adhering surface 5l between thelstra'p'g'l and the inner face of the lug strap giving an extremely long bonded Contact' andzprovides a'greatly 1 increased union and strength between the 'lug strap and the plug than wouldbe'otherwise possible. While this construction does not` utilize struction, formed of inter-rolled canvas and adhesive, having a depression in the U-portion extending substantially throughout the entire area of said U-j y the interlocking method yet it does provide a Within the scope vof claim: l v ,Y

A rivetless lug strap and interlocking plug concornprising a U-shaped lug strap portion and along each arm, providing 'relatively thin inwardly extending flange portionsy equal to thenorrnal width of the lug strap at said U-'shaped ted or otherwise secured independently of metal f rivets, lsolts, or thelike, a suitable plug of yielding material ycan be employed l0K my invention.v f

portion, a plug adapted to cooperate with said lug strapand to iit within said depression, said plugbeing lconstructed and arranged to be retained by the inwardly extending top and bottom iiange portions, said plug and lug strap being retained in interlocking operative pendently oi any rivets.

BRECKINRIDGE T. CLARK.

position inde- 

